Softened by rain and with the scoring conditions nearly perfect, the North Course at Torrey Pines was a dart board for the first round of the Farmers Insurance Open.

Spencer Levin and Kyle Stanley each shot 10-under-par 62 on the North to take the lead, and all but three of the top 25 players on the leaderboard came from the North. The best score on the South was recorded by Mark Turnesa, who made only one bogey in shooting 66, which tied him for 13th.

The South played more than three strokes harder (72.82 to 69.24 for the North), and it was especially tough on San Diegan Phil Mickelson. He hit 11 bunkers, shot 39 on the front nine and had only two birdies in shooting 5-over 77. He was tied for 147th in the field of 156.

Reigning FedEx Cup champion Bill Haas made 11 birdies, including seven in an eight-hole stretch, to threaten tying the North Course record of 61. But he made a double bogey at the North’s par-3 sixth and settled for a 63 to be alone in third.

Mickelson called his score "pathetic."

"I had some good days of practice and I was ready to play," Mickelson said. "I don't know what happened. I just wasn't able to focus."

Stanley, in his second full season on the PGA Tour, burned the North for nine birdies and an eagle at the par-5 finisher. He said he hit his drive 380 yards and rifled an 8-iron to 3 feet. Stanley made five birdies in a six-hole stretch on the back.

Levin grew up in Elk Grove in Northern California and said the North’s poa annua greens are “exactly” like those he has played all of his golfing life. He shot 29 on the back nine, and the 10-under was his lowest career score on tour in relation to par.

“It’s weird, because I really didn’t think about (the low score) when I was out there,” said Levin, who lost a playoff to Johnson Wagner in last year’s Mayakoba Classic. “People talk about getting in the zone. I never even know what that means. … Maybe that’s why I shot that because I just kept trying to hit every shot as good as I could, and I just had a good rhythm going.”